Backtesting can be a painful topic for bankers. In this post, I'll answer the top 5 most common questions I hear about backtesting. I'll reference my first post, Independent Review, Model Validation, and Backtesting, so you might want to revisit it before reading on. In that blog, we looked at the interrelationship of these three items and brought up a few questions on backtesting.
Specifically, we questioned 5 things: who should do it, how often should it be done, what period should be covered, do you need to backtest model results and assumptions, and why even bother if market rates really aren’t changing.